extrinsic status rune `.iter`

[harrysolovay]

Something along the following lines:

const iter = westendDev.Balances
  .transfer({
    value: 12345n,
    dest: billy.address,
  })
  .signed(signature({ sender: alexa }))
  .sent()
  .iter()

for await (const status of iter) {
  // ...
}